Thermoplay Line of nozzles replaces previous range, lowers maintenance times
Thermoplay has introduced its FN series nozzle family that will replace the current F series.
The company said the principal reason for upgrade is to reduce the maintenance time to replace the heater and the thermocouple, which can now be performed without having to remove the nozzle tip.
FN nozzles are available with the diameters of 16, 24, 32 and 46 mm with the same standard lengths of the F- series, the company said. In addition, the versions with diameters of 16, 24 and 32 mm are provided with a special bimetallic insert in titanium and tempered steel inside the tip group, thus allowing a wider area of contact with the mould. This characteristic is said to reduce the risk of wear in the gate area and possible plastic leakage, and also decreases the thermal exchange between nozzle and mould resulting in reduced power consumption.
The gate geometry of the FN series are unchanged in comparison to the F series and therefore can be replaced with the new nozzles without any additional machining in the mould.
The new FN series screw-in nozzle system has all the characteristics as described previously with the benefit of the nozzles being screwed into the manifold. The screw-in nozzle is available for diameters 24, 32, 46 and 60 mm.
The 60 mm-diameter version is provided with a 25 mm internal channel to facilitate optimal flow of material. The valve pin has a diameter up to 10 mm for a wider injection point. The lengths of these nozzles can be customised as required, up to a maximum of 696 mm with multiple heaters. For the 60 mm version, a special manifold has a 30 mm-diameter channel.
The screw-in nozzle is available with or without a valve gate. The shut off group is compact (min height = 89.5 mm) to simplify the mould machining. In addition, the pin can be adjusted without removing the group from the mould.
The screw-in nozzles can be mounted to the manifold with different inclinations for guaranteeing the perpendicularity with the moulded surface, thus following the geometry of the moulded part.
The systems with screw-in nozzles can be supplied pre-wired complete with cooling and pneumatic or hydraulic circuits assembled and ready to be installed into the mould.
A single valve gate has been developed to achieve an optimally balanced system. It is has four flow channels, which divide the melt flow in a homogeneous and uniform manner.